1 files changed, 48 insertions, 0 deletions
diff --git a/zephyr/projects/trogdor/lazor/src/hibernate.c b/zephyr/projects/trogdor/lazor/src/hibernate.c
new file mode 100644
index 0000000000..388ff1b087
--- /dev/null
+++ b/zephyr/projects/trogdor/lazor/src/hibernate.c
@@ -0,0 +1,48 @@
+/* Copyright 2022 The ChromiumOS Authors
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "common.h"
+#include "sku.h"
+#include "system.h"
+#include "usbc_ppc.h"
+
+void board_hibernate(void)
+{
+	int i;
+
+	if (!board_is_clamshell()) {
+		/*
+		 * Sensors are unpowered in hibernate. Apply PD to the
+		 * interrupt lines such that they don't float.
+		 */
+		gpio_pin_configure_dt(
+			GPIO_DT_FROM_NODELABEL(gpio_accel_gyro_int_l),
+			GPIO_DISCONNECTED);
+		gpio_pin_configure_dt(
+			GPIO_DT_FROM_NODELABEL(gpio_lid_accel_int_l),
+			GPIO_DISCONNECTED);
+	}
+
+	/*
+	 * Board rev 5+ has the hardware fix. Don't need the following
+	 * workaround.
+	 */
+	if (system_get_board_version() >= 5)
+		return;
+
+	/*
+	 * Enable the PPC power sink path before EC enters hibernate;
+	 * otherwise, ACOK won't go High and can't wake EC up. Check the
+	 * bug b/170324206 for details.
+	 */
+	for (i = 0; i < CONFIG_USB_PD_PORT_MAX_COUNT; i++)
+		ppc_vbus_sink_enable(i, 1);
+}
+
+void board_hibernate_late(void)
+{
+	/* Set the hibernate GPIO to turn off the rails */
+	gpio_pin_set_dt(GPIO_DT_FROM_NODELABEL(gpio_hibernate_l), 0);
+}